Boiler.



Patenfd sept. 3, 190|. r. A. HEusLEv.

No. 68u89.

BOILEB.

(Application med Apr, 5, 1901.)

(No Windel.)

#se fysmsem.

NTTED STATES PATENT OFFICE.

FRANK ALFRED HENSLEY, OF GONZALES, TEXAS.

BOILER.

SPECIFICATION forming part of Letters Patent No. 681,789, dated September 3, 1901. Application tiled April 5, 1901I Serial No. 54,529. (No model.)

To @LL whom it may concern:

Be it known that I, FRANK ALFRED HENs- LEY, a citizen of the United States, residing at Gonzales, in the county of Gonzales and State of Texas, have invented a new and useful Boiler, of which the following is a specification.

Thisinvention relates to steam-boilers; and the object of the same is to provide simple and eifective means for quickly generating steam by exposing the water fully to the caloric influence of the furnace or lire in the latter through the medium of radial tubular attachments and also avoid liming or other incrusting or adhering deposit, and, further, to prevent water from being drawn upward with the steam into the dome or other steam-receptacle.

lfVith these and other objects and advantages in view the invention consists in the construction and arrangement of the several parts, which will be more fully hereinafter described and claimed.

In the drawings, Figure 1 is a longitudinal vertical section of a boiler embodying the features of the invention. Fig. 2 is a transverse vertical section of the same. Fig. 3 is an enlarged sectional view of one of the attachments. Fig. 4 is a sectional view of one of the attachments and a portion of the boiler, showing a slight modification.

Similar numerals of reference are employed to indicate corresponding parts in the several views.

The numeral l designates the furnace, which may be of any preferred form of construction and has the usual grate-bars 2, Wall 3, and reduced rear portion 4. These parts may be composed of any of the materials now employed in furnace structures, and the walls and other appurtenances will be of the most approved pattern. The boiler 5 is preferably of the elongated cylindrical type and mounted, as usual, above the fire bed or grate and has the full length of the under portion exposed for application of heat from below.

The improvement comprises a plurality of circulating-tubes 6, radiating from a common center, which is the center of the boiler 5, and extending full length of the latter, each alternate series being in longitudinal alinement and each alternate series, transversely considered, being in a different radial plane from the series nextin advance, so as to more fully expose the several series of the tubes to the lire to more quickly heat the same and the Water therein and hasten the circlilation of the latter to prevent the adhering deposit of lime or other substance thereon. Each of the tubes 6 comprises an outer tube 7, which is screwed or expanded into the boiler and closed at its lower end, and supported centrally within the said outer tube 7 is a reduced tube 8, having a lower open end 9, which is cut off at an angle to avoid obstructingcirculation therethrough,the said open end of the inner tube being some distance from the lower closed end of the outer tube. A portion of the tubes, as at lO, on each side are longer than the others and connect with opposite mud-drums ll, consisting of enlarged elongated cylinders or tubes, and the purpose of said drums is obvious to those skilled in the art.

Below and close to the steam-exit pipe or conveyer 12 at the upper rear portion of the boiler a shield-plate 13 is horizontally disposed and provided with a series of perforations lit. The side and one end edges of the said plate are clear of the boiler-shell, and to support the plate suitable hangers l5 are employed. The purpose of this plate is to prevent the steam from carrying or drawing up Water therewith while passing out through the pipe or conveyor 12, it being seen that said plate will prevent the water from rising beyond a predetermined elevation. The open sides and one end, as well as the perforated structure of the plate, will allow the steam to freely pass ott into the pipe or conveyer.

The essential feature of the tube arrangement is the radial disposition thereof from a common center, which is the center of the boiler, and by such arrangement the circulation of the water Will be more rapid and less obstruction offered than in those depending tubular devices which are not radially disposed, but by their irregular angles offer an increased resistance to the return of the water. By this means lime or other deposits are prevented, as a quick circulation will remove such tendency, because the Water does not remain in the tubes long enough to permit adhesion of a deposit thereto, and such deposit, if anyis carried in the water, will be thrown back into the boiler and descend into the mnddrums and remain to be afterward blown out, as usual. The regular arrangement of the circulating-tubes the full length of the boiler as set forth and in the particular radial manner as described. will cause the best heating effect or the obtainance of the full benefit of the heat from one end to the other of the boiler, and a uniformity of circulation and steam generation will be maintained throughout the whole tube series. The tubes all connect with the boiler in a plane at right angles, as clearly shown, and this will also greatly facilitate a rapid circulation and also render the application of the tubes to the boiler more easily accomplished. Ifneces- `sity requires, any one of the tubes may be replaced at will, and to hold the inner tubes in place Within the center of the outer tubes spiders or analogous devices 1G may be employed.

In Fig. 4 a modification of the invention is shown and consists in extending the inner end of the outer tube 16 upwardly into the boiler and providing the inner end of the inner tube l7 with a curved inlet member 18 to separate the steam coming out of tube 16 into the boiler from the Water entering the said member 18 and passing into the tube 17.

Having thus described the invention, what is claimed as new is kl. The combination of a furnace, a boiler longitudinally held and disposed in the upper portion of the furnace, and a plurality of series of radiallyarranged tubes depending from the boiler over the fire and heat-currents below, the said tubes comprising outer tubes with lower closed ends and centrallylocated smaller tubes within the outer tubes and provided with lower open ends, the tubes all radiating from a common center and extending fully over the fire-bed in a transverse direction and attached to the boiler in a plane at right angles to the latter, all of the said tubes having a maximum extent equally from the boiler over the fireplace except the uppermost side tubes and those connecting with the mud-drums.

2. The combination of a furnace, a boiler longitudinally held and disposed in the upper portion of the furnace, and a plurality of tubes depending from the boiler over the lire and heat-currents below, the tubes all radiating from the center of the boiler and extending fully over the fire-bed in a transverse direction, all of the said tubes having a maximum extent equally from the boiler over the fireplace except the uppermost side tubes and those connecting with the muddrums.

3. The combination of a furnace, a boiler longitudinally held and disposed in the upper portion of the furnace, and a plurality of circulating-tubes attached to the boiler and all radiating from a common center which is the center of the boiler and extending full length of the latter, the said tubes being arranged in series and each alternate series being in longitudinal alinement, and each alternate series, transversely considered, being in a dierent radial plane from the series next in advance, and all the series extending fully over the fire-bed in a transverse direction, all of the said tubes having a maximum extent equally from the boiler over the fireplace except the uppermost side tubes and those connecting with the mud-drums.

4. The combination of a furnace, a boiler longitudinally held and disposed in the upper portion of the furnace, and a plurality of series of tubes radiating from a common center, all of the said tubes having a maximum extent equally from the boiler over the fireplace except the uppermost side tubes and those connecting with the mud-drums, the said tubes comprising outer tubes with lower closed ends and smaller tubes within said outer tubes and provided with lower cutaway open ends at a distance above the said closed ends of the outer tubes.

In testimony that I claim the foregoing as my own I have hereto aiiixed my signature in the presence of two witnesses.

FRANK ALFRED HENSLEY.

Witnesses:

G. E. INCE, W. B. SAYERs. 

